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$1,107+ Cheap flights from Idaho to Sydney (SYD)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/6. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SYD
Apr 5 — Apr 121
Sat 4/5
Sat 4/12
1 adult, Economy
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Cheap flight deals from Idaho to Sydney

Keep the following information in mind while searching for Idaho to Sydney flight deals. Data was last updated March 31, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,154
(Alaska Airlines)

Popular in

December

Cheapest in

May

Average price

$1,195
Provider with most accurate pricing for Boise Air Term. Gowen Fld-Sydney Kingsford Smith flight deals.
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Provider most trusted by Cheapflights users for Boise Air Term. Gowen Fld-Sydney Kingsford Smith flights.
Search Deals
From Idaho to Sydney Kingsford Smith
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($283 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($75 potential savings vs. average RT price).
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Average for round-trip flights in March 2025
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Find flight deals from Idaho to Sydney

Cheapest flights from Idaho to Sydney
Explore the most affordable flight options available from Idaho to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 31, 2025.

This Jetabroad deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Jetabroad is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/67:14 pmBOI - SYD
2 stops27h 26mMultiple Airlines
Sat 9/201:45 pmSYD - BOI
2 stops25h 09mMultiple Airlines
Deal found 3/31$1,107
This Alaska Airlines deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/102:44 pmBOI - SYD
2 stops24h 21mAlaska Airlines
Thu 8/219:10 amSYD - BOI
1 stop26h 28mAlaska Airlines
Deal found 3/30$1,154
This Alaska Airlines deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/311:23 pmGEG - SYD
2 stops24h 42mAlaska Airlines
Sat 8/169:10 amSYD - GEG
2 stops31h 49mAlaska Airlines
Deal found 3/31$1,154
This Delta deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/212:32 pmGEG - SYD
1 stop23h 03mDelta
Mon 7/289:25 amSYD - GEG
1 stop21h 25mDelta
Deal found 3/31$1,265
This United Airlines deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/1412:35 pmGEG - SYD
1 stop25h 20mUnited Airlines
Thu 9/2510:20 amSYD - GEG
1 stop19h 49mUnited Airlines
Deal found 3/30$1,306
This Gurufare deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/16:49 pmGEG - SYD
1 stop19h 16mQantas Airways
Sat 7/199:10 amSYD - GEG
1 stop25h 37mQantas Airways
Deal found 3/30$1,314
This American Airlines deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/302:17 pmBOI - SYD
2 stops23h 08mAmerican Airlines
Sun 2/152:30 pmSYD - BOI
1 stop24h 39mAmerican Airlines
Deal found 3/31$1,327
This Orbitz deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/276:40 amGEG - SYD
2 stops34h 50mMultiple Airlines
Tue 12/302:10 pmSYD - GEG
2 stops27h 23mMultiple Airlines
Deal found 3/30$1,397
This American Airlines deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/215:52 amGEG - SYD
1 stop30h 03mAmerican Airlines
Fri 11/285:25 pmSYD - GEG
2 stops24h 36mAmerican Airlines
Deal found 3/30$1,427
This United Airlines deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/54:40 pmBOI - SYD
1 stop22h 20mUnited Airlines
Sat 7/1910:20 amSYD - BOI
1 stop22h 20mUnited Airlines
Deal found 3/30$1,456
This Delta deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/271:10 pmBOI - SYD
1 stop25h 25mDelta
Fri 5/99:25 amSYD - BOI
1 stop21h 34mDelta
Deal found 3/31$1,565
This BYOjet deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure BYOjet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/156:30 amBOI - SYD
3 stops32h 50mAir Canada
Thu 5/229:20 amSYD - BOI
2 stops23h 17mAir Canada
Deal found 3/31$2,085

Cheapflights Fare Finder

Customize your flight search to find flights from Idaho to Sydney that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 31, 2025.
Use the filters below to find and compare flights from Idaho to Sydney that are best for you.

Fly from

Idaho

Fly to

Sydney

Route

Depart

Return

Price

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Thu 7/31

1:23 pm-7:05 am

2 stops24h 42m

Sydney Kingsford Smith

Sat 8/16

9:10 am-11:59 pm

2 stops31h 49m

$1,154

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Mon 7/21

2:32 pm-6:35 am

1 stop23h 03m

Sydney Kingsford Smith

Mon 7/28

9:25 am-1:50 pm

1 stop21h 25m

$1,265

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Thu 5/15

1:00 pm-12:15 pm

2 stops31h 15m

Sydney Kingsford Smith

Thu 5/22

4:20 pm-9:16 pm

2 stops20h 56m

$1,287

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Sun 9/14

12:35 pm-6:55 am

1 stop25h 20m

Sydney Kingsford Smith

Thu 9/25

10:20 am-1:09 pm

1 stop19h 49m

$1,306

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Tue 7/1

6:49 pm-7:05 am

1 stop19h 16m

Sydney Kingsford Smith

Sat 7/19

9:10 am-5:47 pm

1 stop25h 37m

$1,314

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Thu 4/3

6:00 am-7:45 pm

2 stops20h 45m

Sydney Kingsford Smith

Sat 4/5

9:40 pm-1:52 pm

1 stop33h 12m

$1,361

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Sun 4/27

1:10 pm-6:35 am

1 stop25h 25m

Sydney Kingsford Smith

Fri 5/9

9:25 am-2:59 pm

1 stop21h 34m

$1,565

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Mon 7/21

8:48 pm-7:05 am

2 stops41h 17m

Sydney Kingsford Smith

Mon 7/28

5:50 pm-5:47 pm

3 stops40h 57m

$1,603

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Thu 5/15

1:35 pm-7:00 am

1 stop25h 25m

Sydney Kingsford Smith

Thu 5/22

10:20 am-1:50 pm

1 stop19h 30m

$1,606

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Thu 5/15

6:30 am-7:20 am

3 stops32h 50m

Sydney Kingsford Smith

Thu 5/22

9:20 am-4:37 pm

2 stops23h 17m

$2,085

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/31

Showing 1-10 of 15 results
1
2

Best time to book a flight from Idaho to Sydney

Have a flexible travel schedule? Discover the best time to fly to Sydney from Idaho with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Idaho to Sydney

What is the cheapest month to book a flight from Idaho to Sydney?

Currently, February is the cheapest month in which you can book a flight from Idaho to Sydney (average of $1,046). Flying from Idaho to Sydney in December is currently the most expensive (average of $1,643). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ID to SYD?

Find hourly flight availability from Idaho to Sydney. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 31, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Idaho to Sydney as you normally would.

Rainfall in Sydney by month

Plan your trip to Sydney by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Sydney ranges from 2.0 - 5.1 inches per month. March is typically the wettest month, when rainfall can reach 5.1 in. September is typically the driest time to visit Sydney when rainfall is around 2.0 in.

Temperature in Sydney by month

Plan your trip to Sydney by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Sydney, use this chart to help with planning. For those seeking warmer temperatures, January is the ideal time of year to visit, when temperatures reach an average of 71.6 F. Travelers looking to avoid the cold should look outside of July, when temperatures are typically at their lowest (around 51.8 F).

Reviews of airlines servicing Sydney

Get insights into the airlines that provide service to Sydney. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Sydney. Reviews last updated March 31, 2025.
To help decide which airline to fly from Idaho to Sydney, see what other customers have to say about Air Tahiti Nui, Alaska Airlines and Delta. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Air Tahiti Nui
8.7
Very good
61 reviews

Crew

9.1

Food

7.8

Boarding

8.7

Entertainment

7.2

Comfort

8.0

Overall

8.7

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
Air Tahiti Nui
8.7
Very good
61 reviews
Air Tahiti Nui
8.7
Very good
61 reviews

Crew

9.1

Food

7.8

Boarding

8.7

Entertainment

7.2

Comfort

8.0

Overall

8.7

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
Alaska Airlines
8.0
Very good
9,818 reviews
Air Tahiti Nui
8.7
Very good
61 reviews

Crew

9.1

Food

7.8

Boarding

8.7

Entertainment

7.2

Comfort

8.0

Overall

8.7

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
Delta
8.0
Very good
7,899 reviews
Air Tahiti Nui
8.7
Very good
61 reviews

Crew

9.1

Food

7.8

Boarding

8.7

Entertainment

7.2

Comfort

8.0

Overall

8.7

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
Air New Zealand
8.0
Very good
459 reviews
Air Tahiti Nui
8.7
Very good
61 reviews

Crew

9.1

Food

7.8

Boarding

8.7

Entertainment

7.2

Comfort

8.0

Overall

8.7

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
Qantas Airways
7.5
Good
813 reviews
Air Tahiti Nui
8.7
Very good
61 reviews

Crew

9.1

Food

7.8

Boarding

8.7

Entertainment

7.2

Comfort

8.0

Overall

8.7

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.

Related info for your journey

Find useful and relevant information for your journey from Idaho to Sydney. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Sydney from Idaho?

    If you book a flight to Sydney from Idaho, you will be flying to Kingsford Smith, which is the city’s only airport. Sydney Kingsford Smith (SYD) is located 4.6 mi from the center of Sydney.

  • Can I find deals for flights from Idaho to Sydney that include hotel bookings?

    Yes. In addition to deals on Idaho to Sydney flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Idaho to Sydney?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Idaho to Sydney.

  • Can I find deals for business class flights from Idaho to Sydney?

    Yes. Cheapflights offers flight deals from Idaho to Sydney by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Idaho to Sydney?

    Currently, February is the cheapest month in which you can book a flight from Idaho to Sydney (average of $1,046). Flying from Idaho to Sydney in December is currently the most expensive (average of $1,643). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Idaho?

Book flights to Idaho if you plan to visit one of these locations
Wollongong
Parramatta
Coogee
Manly

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Top 2 airlines flying from Idaho to Sydney

Discover the top 2 airlines that operate flights from Idaho to Sydney. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$926Average$1,383FlexibilityNo cancel feeOn-time69%
DeltaCheapest$965Average$1,641FlexibilityNo cancel feeOn-timeN/A
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